void main() {
  //  ==    ！=   >    <    >=    <=

  int a = 5;
  int b = 3;

  print(a == b); //判断是否相等
  print(a != b); //判断是否不等
  print(a > b); //判断是否大于
  print(a < b); //判断是否小于
  print(a >= b); //判断是否大于等于
  print(a <= b); //判断是否小于等于

  if (a > b) {
    print('a大于b');
  } else {
    print('a小于b');
  }
}
